应急广播农村大扬声器系统现状分析

应急广播农村大扬声器系统在有效应对抗自然灾害、积极宣传地方政务、促进农村广播事业发展等方面发挥着巨大作用.目前福建、浙江、四川、青海等多地区已完成或开始了农村大扬声器系统的改造建设,致力于形成一套可管可控、标准规范、安全可靠的农村大扬声器系统.基于我国广电网络现状,对目前应急广播农村大扬声器系统实现的主流方式进行了分析,包括:基于有线/无线RDS调频副载波、基于IP网络、有线/地面数字电视TS流传输,为日后应急广播农村大扬声器系统建设提供参考.     

内蒙古广电网络CAS应急广播功能概述

内蒙古广电网络条件接收系统应急广播功能是一种基于电视技术的应急广播技术,是广电网络参与和谐社会建设、处理突发事件的重要手段。是基于条件接收系统的一个控制功能。目前基于CAS的"应急广播"功能已经趋于成熟,通过多次大网实地测试,功能都达到了设计要求。     

应急广播在中心台站的探索应用

利用现有的调频和地面数字电视播出资源,开展应急广播应用是应急广播体系里的一个重要组成部分。本文以安徽广播电视台大蜀山发射台基于省市两个平台的系统建设为例,介绍一种省级中心发射台的应急广播落地方案,与业内同行交流。     

应急广播大喇叭系统测试内容与方法研究

应急广播体系建设与示范工作正在全国多地展开,各地建设的内容基本包括应急广播省、市、县平台建设,应急广播大喇叭系统建设、应急广播台站系统改造等工作.随着建设工作的展开,以及相关技术标准的逐步形成,应急广播体系的测试将成为日后广电相关部分的重要课题和工作任务.将着重针对应急广播大喇叭系统可能测试的内容和方法展开初步研究.     

广东广电局大力推进应急广播系统建设

一是注重统筹推进。多次召开推进会、座谈会,明确全省应急广播建设目标、任务、要求,督促省级平台建设、审核市级应急广播平台建设方案、指导各地结合实际开展县镇级平台和大喇叭终端的试点建设等。二是大力拓展系统应用。鼓励各地开展应急广播系统的应用探索,如在疫情防控、防风防汛等方面积极发挥宣传作用,探索开展人防工程应急广播终端覆盖的试点建设和测试。三是积极推广经验做法。     

浙江省中波应急广播系统解决方案

依据浙江省农村应急广播建设需求,本文提出了利用浙江省中波覆盖网络构建浙江省中波应急广播系统,作为农村“最后一公里”应急广播覆盖的备份通道.文中对浙江省中波应急广播系统总体架构、主要功能和主要工作流程进行了介绍和说明.该系统的建设为浙江全省应急广播的推进奠定了基础.     

基于广播电视直播卫星的应急广播前端系统的建设思路

本文简要论述了基于广播电视直播卫星的应急广播前端系统建设思路,介绍了直播卫星应急广播系统的实现机制、指令接收、审核以及发布流程,具体包括应急广播系统结构、实现机制、直播卫星平台前端系统、应急广播接收审核系统、应急广播发布系统等.     

市级应急广播建设实践分析

本文以淄博市应急广播建设为例,介绍了淄博市应急广播播送系统总体架构、信息播发流程、安全防护、传输覆盖、终端接收和建设实践,以期为市级应急广播建设实践提供有益借鉴。     

应急广播运维质量分析评价系统架构设计与流程分析

应急广播系统运维质量分析评价是考查系统运维情况和使用情况的重要依据。由于应急广播体系跨越地区行政层级较多、跨域省市贫富不均,应急广播运行质量难免存在差异过大的现象,为满足应急广播运行服务质量在区域间协调和群体间一致的需求,需要提供一种应急广播系统运维质量分析评价的技术手段,以便各地广播电视行政管理部门确定应急广播系统运维质量要求。本文将初步对应急广播运维质量分析评价系统的架构与工作流程进行初步分析与探索。     

基于总局白皮书县级应急广播系统暂行技术要求的实现

德芯应急平台可以接收和处理上级以及横向部门的应急广播信息,同时主备互为备份,采用数字签名认证进行安全播出保证.德芯应急广播根据目前主要传输方式,在一个应急平台上均支持DVB-C/FM/DTMB/IP多种应急方式,这样建设一个平台均可以实现和扩展更多的应急方式,IP网络传输目前也考虑到了4G、大无线网络传输.终端是应急广播最终播出载体,为了实现广泛应急目的,应急广播接收必须考虑多种方式接收,德芯公司针对应急广播系统播出终端提供了各种解决方式.     

Resolution Enhancement Technology:Integrated Process Solutions using OPC

DUV lithography, using the 248 nm wavelength, is a viable manufacturing option for devices with features at 130 nm and less. Given the low kl value of the lithography, integrated process development is a necessary method for achieving acceptable process latitude. The application of assist features for rule based OPC requires the simultaneous optimization of the mask, illumination optics and the resist.Described in this paper are the details involved in optimizing each of these aspects for line and space imaging.A reference pitch is first chosen to determine how the optics will be set. The ideal sigma setting is determined by a simple geometrically derived expression. The inner and outer machine settings are determined, in turn,with the simulation of a figure of merit. The maximum value of the response surface of this FOM occurs at the optimal sigma settings. Experimental confirmation of this is shown in the paper.Assist features are used to modify the aerial image of the more isolated images on the mask. The effect that the diffraction of the scattering bars (SBs) has on the image intensity distribution is explained. Rules for determining the size and placement of SBs are also given.Resist is optimized for use with off-axis illumination and assist features. A general explanation of the material' s effect is discussed along with the affect on the through-pitch bias. The paper culminates with the showing of the lithographic results from the fully optimized system.     

Cost-effective test solutions for smart card and other integrated flash applications

From its emergence in the late 1980s as a lower cost alternative to early EEPROM technologies, flash memory has evolved to higher densities and speedsand rapidly growing acceptance in mobile applications.In the process, flash memory devices have placed increased test requirements on manufacturers. Today, as flash device test grows in importance in China, manufacturers face growing pressure for reduced cost-oftest, increased throughput and greater return on investment for test equipment. At the same time, the move to integrated flash packages for contactless smart card applications adds a significant further challenge to manufacturers seeking rapid, low-cost test.     

Theoretical analysis of the relationship between the Brillouin gain coefficient and the strain in the optical-fiber sensors

The relation between the power of the Brillouin signal and the strain is one of the bases of the distributed fiber sensors of temperature and strain. The coefficient of the Bfillouin gain can be changed by the temperature and the strain that will affect the power of the Brillouin scattering. The relation between the change of the Brillouin gain coefficient and the strain is thought to be linear by many researchers. However, it is not always linear based on the theoretical analysis and numerical simulation. Therefore, errors will be caused if the relation between the change of the Brillouin gain coefficient and the strain is regarded as to be linear approximately for measuring the temperature and the strain. For this reason, the influence of the parameters on the Brillouin gain coefficient is proposed through theoretical analysis and numerical simulation.     

An improved parallel thinning algorithm with two subiterations

The parallel thinning algorithm with two subiterations is improved in this paper. By analyzing the notions of connected components and passes, a conclusion is drawn that the number of passes and the number of eight-connected components are equal. Then the expression of the number of eight-connected components is obtained which replaces the old one in the algorithm. And a reserving condition is proposed by experiments, which alleviates the excess deletion where a diagonal line and a beeline intersect. The experimental results demonstrate that the thinned curve is almost located in the middle of the original curve connectivelv with single pixel width and the processing speed is high.     

Novel fiber-optical interferometer with miniaturized probe for in-hole measurements

Today, micro-system technology and the development of new MEMS （Micro-Electro-Mechanical Systems） are emerging rapidly. In order for this development to become a success in the long run, measurement systems have to ensure product quality. Most often, MEMS have to be tested by means of functionality or destructive tests. One reason for this is that there are no suitable systems or sensing probes available which can be used for the measurement of quasi inaccessible features like small holes or cavities. We present a measurement system that could be used for these kinds of measurements. The system combines a fiber optical, miniaturized sensing probe with low-coherence interferometry, so that absolute distance measurements with nanometer accuracy are possible.     

Development of the readout system for waveguide multilayer optical card

Waveguide multilayer optical card （WMOC） is a novel storage device of three-dimensional optical information. An advanced readout system fitting for the WMOC is introduced in this paper. The hardware mainly consists of the light source for reading, WMOC, motorized stages addressing unit, microscope imaging unit, CCD detecting unit and PC controlling ＆ processing unit. The movement of the precision motorized stage is controlled by the computer through Visual Basic （VB） language in software. A control panel is also designed to get the layer address and the page address through which the position of the motorized stages can be changed. The WMOC readout system is easy to manage and the readout result is directly displayed on computer monitor.     

Study of waveguide coupling efficiency in hybrid silicon lasers

This paper presents a new method to increase the waveguide coupling efficiency in hybrid silicon lasers. We find that the propagation constant of the InGaAsP emitting layer can be equal to that of the Si resonant layer through improving the design size of the InP waveguide. The coupling power achieves 42% of the total power in the hybrid lasers when the thickness of the bonding layer is 100 nm. Our result is very close to 50% of the total power reported by Intel when the thickness of the thin bonding layer is less than 5 nm. Therefore, our invariable coupling power technique is simpler than Intel＇s.     

Collinear phase-matching study of terahertz-wave generation via difference frequency mixed in GaAs and Inp

The collinearly phase-matching condition of terahertz-wave generation via difference frequency mixed in GaAs and InP is theoretically studied. In collinear phase-matching, the optimum phase-matching wave hands of these two crystals are calculated. The optimum phase-matching wave bands in GaAs and lnP are 0.95-1.38μm and 0.7-0.96μm respectively. The influence of the wavelength choice of the pump wave on the coherent length in THz-wave tuning is also discussed. The influence of the temperature alteration on the phase-matching and the temperature tuning properties in GaAs crystal are calculated and analyzed. It can serve for the following experiments as a theoretical evidence and a reference as well.     

Effects of the alloy compositions on the phonon-polaritons in ternary mixed crystals

Composition dependence of bulk and surface phonon-polaritons in ternary mixed crystals are studied in the framework of the modified random-element-isodisplacement model and the Bom-Huang approximation. The numerical results for Several Ⅱ - Ⅵ and Ⅲ- Ⅴ compound systems are performed, and the polariton frequencies as functions of the compositions for ternary mixed crystals AlxGa1-xAs, GaPxAS1-x, ZnSxSe1-x, GaAsxSb1-x, GaxIn1-xP, and ZnxCd1-xS as examples are given and discussed. The results show that the dependence of the energies of two branches of bulk phonon-polaritons which have phonon-like characteristics, and surface phonon-polaritons on the compositions of ternary mixed crystals are nonlinear and different from those of the corresponding binary systems.     

New insert layer structure OLEDs

An insert layer structure organic electroluminescent device（OLED） based on a new luminescent material （Zn（salen）） is fabricated. The configuration of the device is ITO/CuPc/NPD/Zn（salen）/Liq/LiF/A1/CuPc/NPD/Zn（salen）/Liq/LiF/A1. Effective insert electrode layers comprising LiF（1nm）/Al（5 nm） are used as a single semitransparent mirror, and bilayer cathode LiF（1 nm）/A1（100 nm） is used as a reflecting mirror. The two mirrors form a Fabry-Perot microcavity and two emissive units. The maximum brightness and luminous efficiency reach 674 cd/m^2 and 2.652 cd/A, respectively, which are 2.1 and 3.7 times higher than the conventional device, respectively. The superior brightness and luminous efficiency over conventional single-unit devices are attributed to microcavity effect.